S Scientists have warned that the largest solar flare in six years could be headed for Earth in a matter of days. This comes after the flare blanked radio frequencies, including a major radio blackout in South America.

The National Oceanic and Atmospheric Administration recently reported that the solar flare “is likely one of the largest solar radio events ever recorded.” The flare is caused by explosions on the surface of the sun, which then expand outward and spew bursts of electromagnetic radiation.

The New York Post reported that the solar flare occurred on Thursday after a sunspot known as AR 3514 erupted with a class X.28 solar flare — the largest variety of flare that our sun is capable of producing. The report went on to say that the flare was the largest the star has generated since 2017.